221330332 has 48 divisors (see below), whose sum is σ = 408965760. Its totient is φ = 104712192.

The previous prime is 221330309. The next prime is 221330339. The reversal of 221330332 is 233033122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221330339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 966394 + ... + 966622.

It is an arithmetic number, because the mean of its divisors is an integer number (8520120).

Almost surely, 2^221330332 is an apocalyptic number.

It is an amenable number.

221330332 is a deficient number, since it is larger than the sum of its proper divisors (187635428).

221330332 is a wasteful number, since it uses less digits than its factorization.

221330332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 221330332 is about 14877.1748662170. The cubic root of 221330332 is about 604.8954417128.

Adding to 221330332 its reverse (233033122), we get a palindrome (454363454).

The spelling of 221330332 in words is "two hundred twenty-one million, three hundred thirty thousand, three hundred thirty-two".